Title: Time for a new VINTAGE TOPIC....What do you ride in 2013 ????
Post by: citabjockey on December 18, 2012, 03:32:28 PM
I ride a '73 yamaha CT3 175. And recently my daughter started riding a full sized bike for the first time. And of course its another two stroke -- 1986 IT200. This was a parts donor bike for the prior owner until we rescued it....
Title: Time for a new VINTAGE TOPIC....What do you ride in 2013 ????
Post by: Uniflow on December 20, 2012, 03:18:48 AM
Citabjockey, how's that RT3 going?
Title: Time for a new VINTAGE TOPIC....What do you ride in 2013 ????
Post by: Uniflow on December 20, 2012, 04:28:19 AM
Title: Time for a new VINTAGE TOPIC....What do you ride in 2013 ????
Post by: citabjockey on December 20, 2012, 05:41:35 AM
The RT3 is working pretty well. There is a jetting (or possible small air leak) issue when it gets hot, at higher engine rpms and low throttle settings. There is a small range of throttle settings where it can ping. I really have to figure that one out sometime. Its pretty easy to avoid that operating mode so its been back burnered.
Title: Time for a new VINTAGE TOPIC....What do you ride in 2013 ????
Post by: Uniflow on December 21, 2012, 07:14:45 AM
citabjockey, sorry about the crappy video at least you can see the bighorn running. This is the first time started with the "ball valve" intake. tuning is all wrong now as the TPS to airflow is different. I need a bit of time to re tune it. You don't have an air leak around the reed rubber on your RT3? They do crack when they get old. Not trying to tell you how to "suck eggs" just it's something I've noticed with all my old Yamaha rubber boots.
Title: Time for a new VINTAGE TOPIC....What do you ride in 2013 ????
Post by: citabjockey on December 21, 2012, 09:29:13 PM
Hey Uniflow, that bighorn project has me glued to your posts. I love this research project.
For the RT3, this is the older intake design where the reed block has studs in it to mount the carb solid to it with a 1/4" fiber spacer in between. This unit is not leaking. There is a small amount of oil accumulating around the exhaust side of the base gasket so I think that is probably the culprit. But -- have to setup a leakdown testing to be sure 1) that there is a leak and 2) that when I think its fixed it REALLY is fixed.
citabjockey, sorry about the crappy video at least you can see the bighorn running. This is the first time started with the "ball valve" intake. tuning is all wrong now as the TPS to airflow is different. I need a bit of time to re tune it. You don't have an air leak around the reed rubber on your RT3? They do crack when they get old. Not trying to tell you how to "suck eggs" just it's something I've noticed with all my old Yamaha rubber boots.
Title: Time for a new VINTAGE TOPIC....What do you ride in 2013 ????
Post by: Uniflow on December 21, 2012, 11:43:02 PM
Took the Bighorn for a quick lap round the back yard, if you hit second you are in the fence. Tight, but the Bighorn seems a lot cleaner around the bottom end where there was a problem earlier. Much nicer throttle response. I better give it a wash before the next video.
Title: Time for a new VINTAGE TOPIC....What do you ride in 2013 ????
Post by: factoryX on December 23, 2012, 08:50:34 AM
AS of now a 1979 cr250 Elsinore, runs, and it came with fox air shocks that don't leak haha, will post pics either tomorrow or Tuesday(Got it from my uncle).
Title: Time for a new VINTAGE TOPIC....What do you ride in 2013 ????
Post by: VintageBlueSmoke on January 14, 2013, 04:24:08 PM
I awoke on Jan 1st with a strange situation. I have over 15 motorcycles and on that particular morning, NONE of then were operational (not counting my '96 Beta Techno 250 trials bike). I guess you could say my New Years resolution is to get as many of them rideable as possible.
The first one ready is my 1975 Husqvarna 175 Cross Country. I needed to replace the cracked Amal Carb (with a Mikuni) and put new crank seals.
The second one is my 2008 KTM SX144. I was supposed to race last weekend with it but (luckily) the race was postponed (poor advertisement - I was the only entry!).
I also cleaned the carbi on my 3 y/o son's '96 Husqvarna 50. So I could ride that if necessary.
I also got my quad ready for another season of abuse. It's a 4-stroke (2004 Suzuki LT-Z 400) but it only cost $200 and came with a trailer so save the Quad Puke jokes. Hey, if your buddy has a 4$ that is backfiring and he thinks he's about to blow it up...check to see if the exhaust is bolted to the head...or offer him $200 if he'll thow in his trailer!
Title: Time for a new VINTAGE TOPIC....What do you ride in 2013 ????
Post by: TMKIWI on January 15, 2013, 05:57:30 AM
Hey, if your buddy has a 4$ that is backfiring and he thinks he's about to blow it up...check to see if the exhaust is bolted to the head...or offer him $200 if he'll thow in his trailer!